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Keywords:

  • adsorption;
  • cage compounds;
  • gas storage;
  • microporous materials;
  • Schiff bases
Thumbnail image of graphical abstract

Preference for polar adsorbates: The crystalline porous organic cage compound shown has an exceptional high surface area (1566 m2 g−1) and selective gas uptake. The compound preferably adsorbs CO2 (9.4 wt %) over methane (0.98 wt %).